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astronautics

noun [U]
 
 
/ˌæs.trəˈnɔː.tɪks/ US  /-trəˈnɑː.t̬ɪks/

Definition

the technology related to space travelSpace travel
(Definition of astronautics noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of astronautics